Lentil soup is a hearty and healthy soup that is packed with protein and fiber. It is made with lentils, onions, carrots, celery, and tomatoes. The soup is seasoned with cumin, coriander, salt, and pepper. The lentils are cooked in a broth until tender. This soup is easy to make and can be made in under an hour. It is a great way to get your daily dose of protein and fiber.